| 主权项 |
1. A method in a radio base station, said radio base station configured to participate in multi-point High Speed Downlink Packet Access, HSDPA, operation wherein data is communicated to a first user equipment via the radio base station and at least one other radio base station, the method comprising:
receiving Medium Access Control protocol handling dedicated data Protocol Data Units, MAC-d PDUs, from a radio network controller in data frames, wherein each data frame conveying MAC-d PDUs is associated with a sequence number; buffering the received MAC-d PDUs in a buffer pending transfer to the first user equipment; and receiving a discard indication signal from the radio network controller, wherein said discard indication signal includes a data frame sequence number and wherein the discard indication signal indicates to the radio base station that MAC-d PDUs received by the radio base station in a data frame associated with said sequence number can be discarded; wherein the discard indication signal is a High Speed Downlink Shared Channel, HS-DSCH, DATA FRAME including the first data frame sequence number and a discard flag indicating that MAC-d PDUs received by the at least one radio base station in the data frame associated with the first data frame sequence number can be discarded; and wherein the HS-DSCH DATA FRAME includes a New Information Element, IE, Flags field, wherein the New IE Flags field indicates that the discard flag and the first data frame sequence number are present in the HS-DSCH DATA FRAME and the discard flag and the first data frame sequence number are included in two octets following the New IE Flags field. |
